Texas Rep. Michael McCaul became the wealthiest member of Congress in 2010, dethroning Sen. John Kerry of Massachusetts, after the Austin Republican’s net worth skyrocketed thanks to gifts from his wife’s parents.

McCaul, whose district stretches from Austin into Harris County, saw his net worth increase from at least $73.8 million in 2009 to at least $287 million in 2010, The Hill newspaper reported Monday.

The Hill reported that his wealth rose in part because of assets that McCaul estimated as being at least $50 million each, according to personal financial disclosures. His spouse acquired additional assets in the form of gifts from her parents, The Hill reported.

All the assets he lists in his disclosure form are attributed to his wife or a dependent.

The net worth of Kerry, a Massachusetts Democrat, rose $5 million as he paid off some of his $44 million in debt from 2010, The Hill reported. His assets remained about the same, at $232 million.

McCaul’s wife Linda is the daughter of Clear Channel Communications founder Lowry Mays and sister of Mark Mays, CEO of the telecommunications giant. He is the chairman of the House Homeland Security Committee’s oversight and investigations panel.